Perpetual calendar

ABSTRACT

A perpetual calendar wherein the days of the month are arranged in two annular areas on a first member and a second annular member is calibrated into days of the weeks, which calibrations are located opposite appropriate days of the month on the first member and the second member is angularly adjustable with respect to the first member.

[ Apr. 23, 1974 ,692 12/192] Harris...................................40/113 PERPETUAL CALENDAR [76] Inventor: C. Louis Smader, 129 Laurel Ten,

Cheshire Conn Q6410 Primary Examiner-Robert W. Michell Assistant Examiner-J. H. Wolff Apr. 7, 1972 Filed: Attorney, Agent, or Firm-DeLio and Montgomery [21} Appl. No: 241,976

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[51] Int. Cl. [58] Field of Search 5 1 References Cited of the weeks, whrch callbratrons are located opposrte UNITED STATES PATENTS appropriate days of the month on the first member and the second member is angularly adjustable with respect to the first member.

40/113 Ferreres 40/113 Maclaganuwu...................... 40/113 6 Claims, 4 Drawing Figures PERPETUAL CALENDAR This invention relates to calendars and more particularly relates to a perpetual calendar which may be adjusted with facility for every year including leap years.

Calendars adapted to operate over a number of years or an indeterminately long number of years have previously been proposed, as exemplified by U. S. Pat. No. 623,813. This type of calendar has attempted to provide a space for each day of a year in essentially parallel side-by-side relation in one annular array. Additionally, on a matching piece are provided 52 weeks divided into days of the week which is angularly adjustable with respect to the days of the month.

The spaces representing the days of the month are designed to have information such as birthdays, anniversaries and other special events noted therein.

However, such calendars have never found useful acceptance, primarily it is believed, because the space provided in dividing an annular space into 365 or 366 equal spaces is very small within the confines of the acceptable size of a calendar or similar wall hanging device.

Accordingly, the present invention provides a perpetual calendar of acceptable size which provides 366 days divided into twelve months in such a space as to provide space for annual notations for each day of the month without the overall size becoming objectionable.

The present invention further provides a representation of the 52 weeks of the year that is angularly adjustable with respect to the days of the month together with calibrations for annually setting the day of week indications with respect to the day of the month indications either for an ordinary year or for a leap year.

An object of this invention is to provide a new and improved calendar which is reusable from year-to-year.

Another object of this invention is to provide a new and improved calendar of the type described which provides spaces for notations on each day of the year.

A further object of this invention is to provide a calendar of the type described with new and improved indicia for quick, accurate resetting each year.

The features of the invention which are believed to be novel are particularly pointed out and distinctly claimed in the concluding portion of the specification. The invention, however, both as to its organization and operation together with further objects and advantages thereof may best be appreciated by reference to the following detailed description taken in conjunction with the drawings, wherein:

FIG. 1 is a view of an overall device embodying the invention;

FIG. 2 is an enlarged view of a section of FIG. 1, showing month and day of week calibrations;

FIG. 3 is an enlarged view of a section of another member having day of week calibrations thereon; and

FIG. 4 is an enlarged view of a portion of the member of FIG. 3.

Briefly stated, the invention in one form thereof comprises a first circular member having a first plurality of radially extending spaces in annular array defining every second day of a month. A second plurality of radially extending spaces is also provided in a second annular array defining every second day of a month intermediate said first plurality intermediate the days in the first annular array and offset one-half space with respect thereto. A second circular member having day of the week calibrations is mounted about a common axis with respect to the first member and is angularly adjustable with respect thereto.

With reference to FIGS. 1, 2 and 3, the invention generally comprises a first annular member 10 which has thereon a first plurality of spaces 11 generally defined by radii from the center of the member 10 in an annular array 12 where each space defines every second day of a year. A second plurality of spaces 13 are also defined by radii from the center 14 of member 10 and disposed in an annular array 15. The second plurality of spaces indicates every second day of the year alternating with respect to the first spaces 11. The radii defining the second plurality of spaces fall essentially on the center line of the first plurality of spaces and vice versa. The spaces of the first and second pluralities thereof are numbered alternately in accordance with the days of each month, and heavy lines 16 are drawn to define a boundary of the days of each month. Between the lines 16 on an outer peripheral segment of member 10 is written the name of the month as exemplified by February on segment 17. Each of the spaces is preferably drawn so that the radial inner portion thereof defines an arrow-like ending as exemplified by the reference numerals 18 and 19, the point of the arrow 19 residing along a dividing line between the spaces 13. Generally, arrow-like markings 20 are provided at the radial outer end between the spaces 11 with the tip thereof residing on a radial line which would pass through the center of a space 13.

It will be noted that the days of the month as exemplified by the month February, in each adjacent day, alternate in representation commencing with one of spaces 13, one of spaces 11, then a space 13, a space 11, etc. It will be apparent that there will be 183 spaces 11 and 183 spaces 13 with the spaces of one annulus being offset essentially one-half space with respect to the spaces of the other annulus. As thus presented, the calendar provides 366 days including the 29th of February. The spaces as provided are thus large enough for a small notation indicating the significance of a particular date, as will hereinafter be described. The tip of an arrow of one of the spaces 13 will represent that space while the valley 21 between two tips will represent the date between the two tips to provide a readily observable indication of a particular day of the month.

The member 22 is calibrated about its periphery into 366 days of the year with the major divisions of sevenday calibrations where Sunday is shown as the base day for calibration purposes. However, between Sundays S9 and S10 on the member 22 shown, there are eight calibrations to compensate for non-leap years. In such cases, February 29th is ignored and the actual day of the week may be determined by looking backward from Sunday S10. Additionally, between Sunday S52 and S2 there are fifteen calibrations rather than the normal fourteen. More specifically, there are eight calibrations between Sunday S52 and Sunday S1 to compensate for the 365th day of the year. Sunday S52 may be considered under certain conditions to represent the 365th day of a non-leap year which begins on a Sunday. The same statement is valid with respect to the other days of the week following these Sundays. in consecutive 365- day years, the first day of January is always on the next day of the week with respect to the previous year. The one-day calibration offset between Sundays S52 and S1 compensates for the 365th day of the year.

FIGS. 3 and 4 represent another member 22 which is used during leap years. In this arrangement, there are seven calibrations between Sundays S9 and S10, since February 29th is not ignored. However, there will now be sixteen calibrations between Sundays S52 and S2 with a two-day offset between Sundays S53 and S1. This two-day offset is representative of the 365th and 366th days of a leap year. In a preferred form, the members 22 and 22 are formed in back-to-back relation or may be one member with the appropriate printing on both sides.

For setting or resetting purposes, member 11 is provided with an index line indicated by the dotted line 23 in F IG. 2 and is normally covered by member 22 or 22'. The index line 23 is visible through a window 24 in member 22. Extending to window 24 are seven radial lines coinciding with day calibrations on the periphery of member 22 between Sundays S9 and S10. These reset lines indicated by the reference numeral 25 are utilized to reset the calendar each year by placing one of lines 25 in registry with index line 23 in accordance with Table I set forth below. On members 22 and 22 there are additional seven index reset lines 25 which span Sunday 810 and which are utilized for resetting on leap years. Table I below sets forth charts which may be marked on members 22 and 22' for a reset guide. Chart I would be marked on member 22 and Chart II marked on member 22.

Leap year-use Chart II.

For years beyond the year 2000 the proper year is determined by subtracting 28 from that year. For example, the year 2001 would be set the same as in 1973.

The disclosed calendar thus provides notation or marking spaces for 366 days of the year within a space exemplified by the full scale of the drawings. The invention further provides a novel reset feature which allows the calendar to be used ad infinitum. The calendar may be made extremely decorative and pleasing in appearance, as by making the months different colors or by coloring differently the various. Zodiac periods. Additionally, the center portion of member 22 could receive thereover representations of the various Zodiac periods in similar color to the day of the month colormg.

The calendar may be mounted to a support member which would include a pointer as exemplified at 26 in FIG. 1, and then rotated each day, or preferably each month, and the month centered under the pointer 26. Alternatively, the calendar would be driven by a geared down synchronous motor.

The day of the month spaces may be filled for repetitive information for anniversaries, birthdays and any memorial occasions. Additionally, non-repetitive appointments could be temporarily marked thereon as by means of a tag or removable pin.

it may thus be seen that the objects of the invention set forth above as well as those made apparent from the preceding description are efficiently attained. Other embodiments of the disclosed invention, as well as modifications to the disclosed embodiment may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments of the invention and modifications to the disclosed embodiments thereof which do not depart from the spirit and scope of the invention.

What is claimed is:

l. A calendar comprising a member having an outer annular border, means dividing said border into spaces representative of twelve months, means defining a first plurality of radially extending spaces in annular array within and concentric with said border and representative of every second day of a month throughout a year, means defining a second plurality of radially extending spaces in a second annular array within and concentric with said first annular array and representative of every other second day of a month throughout a year, said second plurality of spaces being defined by radii passing substantially through the center of two adjacent spaces of said first array of spaces, said first and second plurality of spaces being adapted to receive notations of significance regarding a day of the month, a circular member, means rotatably mounting said circular member concentric with said first and second annular arrays to said member said circular member having a periphery immediately adjacent the radial inner ends of said second annular array of spaces, said circular member having a plurality of equi-angularly spaced calibrations at the periphery thereof repetitively representative of the seven days of the week throughout a year, said calibrations adapted to be radially aligned with said spaces of said first and second annular arrays upon rotation of said second member with respect to said first member.

2. The calendar of claim 1 wherein said first plurality of spaces are defined by equi-angularly spaced lines and said lines coincide with the radial center of each of said second plurality of spaces.

3. The calendar of claim 1 wherein said circular member has 366 day calibrations thereon.

4. The calendar of claim 3 wherein said day calibrations are divided into 52 major week divisions, one of said major divisions has eight calibrations therebetween, and another two adjacent of said major divisions has fifteen calibrations therebetween, said one of said major divisions being adapted to be positioned to span the date of February 29th on said member, said two major divisions being positioned on said member to span the date of December 31st on said member.

5. The calendar of claim 3 wherein said day calibrations are divided into 52 major divisions and two adjacent of said major divisions have sixteen calibrations window therein so that said index line may be viewed therethrough, said circular member having day calibrations at said window adapted to be aligned with said index line in accordance with the year. 

1. A calendar comprising a member having an outer annular border, means dividing said border into spaces representative of twelve months, means defining a first plurality of radially extending spaces in annular array within and concentric with said border and representative of every second day of a month throughout a year, means defining a second plurality of radially extending spaces in a second annular array within and concentric with said first annular array and representative of every other second day of a month throughout a year, said second plurality of spaces being defined by radii passing substantially through the center of two adjacent spaces of said first array of spaces, said first and second plurality of spaces being adapted to receive notations of significance reGarding a day of the month, a circular member, means rotatably mounting said circular member concentric with said first and second annular arrays to said member said circular member having a periphery immediately adjacent the radial inner ends of said second annular array of spaces, said circular member having a plurality of equi-angularly spaced calibrations at the periphery thereof repetitively representative of the seven days of the week throughout a year, said calibrations adapted to be radially aligned with said spaces of said first and second annular arrays upon rotation of said second member with respect to said first member.
 2. The calendar of claim 1 wherein said first plurality of spaces are defined by equi-angularly spaced lines and said lines coincide with the radial center of each of said second plurality of spaces.
 3. The calendar of claim 1 wherein said circular member has 366 day calibrations thereon.
 4. The calendar of claim 3 wherein said day calibrations are divided into 52 major week divisions, one of said major divisions has eight calibrations therebetween, and another two adjacent of said major divisions has fifteen calibrations therebetween, said one of said major divisions being adapted to be positioned to span the date of February 29th on said member, said two major divisions being positioned on said member to span the date of December 31st on said member.
 5. The calendar of claim 3 wherein said day calibrations are divided into 52 major divisions and two adjacent of said major divisions have sixteen calibrations therebetween adapted to span December 31st on said member.
 6. The calendar of claim 1 wherein said member has a radial index line extending to the space representing the 29th day of February, said circular member has a window therein so that said index line may be viewed therethrough, said circular member having day calibrations at said window adapted to be aligned with said index line in accordance with the year. 